18 10 034 Replacing both rear silencers (N54)

WARNING: This page is about a different variant/trim than selected.

WARNING: Scalding hazard!

Only perform these tasks on an engine that has cooled down.

Necessary preliminary tasks

Support rear silencer with special tool 31 2 220.

Fig 1: Supporting Rear Silencer Using Special Tool (31 2 220)

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NOTE: If the cutting line is not marked by a punch mark in the pipe, determine the cutting line by means of the pipe length on the new rear silencer.

Carry over cutting line to faulty rear silencer and mark.

Cut through exhaust pipes at marked point with a suitable tool.

Fig 2: Cutting Exhaust Pipes Through Marked Point Using Suitable Tool

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Picture shows the left side, the procedure for the right side is identical.

Release screw (1) on rubber mount.

Tightening torque 18 31 4AZ .

Fig 3: Identifying Screw

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Slacken nut (1).

Tightening torque 18 31 5AZ .

Fig 4: Identifying Slacken Nut

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Pull off vacuum hose (1).

Slacken nut (2).

Tightening torque 18 31 5AZ .

Lower and remove rear silencer with assistance of a second person.

Fig 5: Identifying Slacken Nut And Vacuum Hose

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Installation:

Connect front pipes to rear silencers by means of clamps and align.

Centre clamps and tighten down.

Tightening torque 18 20 3AZ .

Fig 6: Locating Clamps Bolts

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NOTE: Check exhaust system for leaks.

Check rubber mount for damage.

If necessary, replace damaged rubber mounts.